- 蒲心誠1,王 沖1,劉 芳1,王勇威2,萬朝均1,楊長輝1
2008年第2期
摘要
引用本文
摘 要:論述了制備特超強高性能混凝土的技術途徑與配比參數。采用常規的原材料及通用的制備工藝,以0.14~0.18的極低水膠比,制成了流動性優異、強度特高的特超強高性能混凝土,混合料坍落度達268mm,擴展度達680mm,90d抗壓強度達175.8MPa,365d達到182.9MPa。與活性粉末混凝土相比,特超強高性能混凝土具有原料易得、制備簡單、施工容易、成本低廉等優勢,將成為未來混凝土科技發展的主導方向。文章還討論了這種混凝土的水化放熱、收縮及脆性等問題。討論表明,這些混凝土所固有的問題,均有獲得滿意解決的有效途徑。文章還展望了這種混凝土的未來應用前景。
Abstract:The preparational technology of ultra high strength high performance concrete (UHSHPC) is developed and the parameters of mix proportion is introduced. Based on the ordinary raw materials, the usual techniques and the extremety low water binder ratio of 0.14 to 0.18, UHSHPC with excellent workability and ultra high strength is successfully produced, the slump of which is up to 268mm, and the spread diameter of slump is more than 680mm, in the meantime, the compressive strength is higher than 175.8 MPa at the age of 90 days and more than 182.9 MPa after 365 days. The UHSHPC has several advantages such as the good availability of raw materials, the simplicity of production, the easiness for construction, the low production costs and etc., compared with the reactive powder concrete. As a result, UHSHPC will becom the main trend of the future concrete technology. The heat evolution during cement hydration, the shrinkage, and the brittleness of this UHSHPC are concerned and discussed. Even though all the above concerns are related with the intrinsic problems of concrete, the effective ways could be found to solve these problems satisfactorily. Finnally, the prospects for application of this UHSHPC are described by authors.